This is a little plane I built recently out of foamboard, 30 inch wingspan, 10 gram 1000kv outrunner, for now,...... all 9g servos. ... flying weight of 9.07 oz...
Have not yet flown a maiden but should be within next few days...will post video when I do...Have another on the board yet to cut, it has the stabs enlarged like an extra 330 and will be a cut out version also, with a 24 g motor, and will look like a P-51...Good Times.......

Did Haiduk ever post the plans for the 40" Aeronca L3 from the first post? I'd like to build one for myself and one for my neighbor, and I think these are the best looking of all the champs I've seen here. I've searched this thread with the thread tools and with google, searched duk's posts....am I missing something?

Duk said his dad built the L3 and was going to work on plans. Usually we move on and never look back, as there are too many new airplanes we want to build. However if you look close it is very similar to a Blue Baby fuselage, with altered wing and tail. If you look at the first couple page of the Blue Baby Thread, you will see someone made a tail to make a BB look like a Cessna Birddog by simply rounding the fin/rudder.

Many designs are just altered plans from something else. Just need to squint at a 3 view and get it close using the edges of the original to keep size proportinate.

I built a monoblockless BB33 with KFm3 wing, flies incredibly nice (great plane dz1sfb and tony65x55!). I suppose all I would really need to do is alter those plans to look more like a champ. I was hoping for some direction on the cambered flat bottom wing construction, although I am thinking now that an Armin wing would be the ticket.

Did Haiduk ever post the plans for the 40" Aeronca L3 from the first post? I'd like to build one for myself and one for my neighbor, and I think these are the best looking of all the champs I've seen here. I've searched this thread with the thread tools and with google, searched duk's posts....am I missing something?...

Ben,
Nope, I never did get around to posting plans for that plane. I moved on to other projects and never got back to it. If there is interest in a 40" Aeronca L3, I'll start a thread and get one drawn up and tested.

Ben,
Nope, I never did get around to posting plans for that plane. I moved on to other projects and never got back to it. If there is interest in a 40" Aeronca L3, I'll start a thread and get one drawn up and tested.

-Duk

Thanks Haiduk. I don't need you to go to all that trouble for just me, so I'll see if I can't eyeball it and get something that looks close. How was the flat bottom airfoil built?

Edit: Wing picture caption in post # ONE - "Second version of the wing is a "built up" Clark Y type airfoil. Each wing panel has 3 ribs and a spar. This one is lighter than the KF version too."

Images

I think my pops found his original drawings. Waiting for him to email them to me.

Quote:

Originally Posted by bhoov128

..."Second version of the wing is a "built up" Clark Y type airfoil. Each wing panel has 3 ribs and a spar. This one is lighter than the KF version too."...

If I remember right the wings had 3 ribs per half that were keyed into slots in a strip spar. That assembly was glued down to a flat sheet then the top sheet was dry rolled and glued over the top of everything. Let me see what pops has drawn up. I'll see if I can clarify for you.

This is a very dumb question but how do you cut foam from plans? Do you trace them on the foam and then cut it? or do you cut it with the plans on the foam? i have tried both neither work well for me. Wish I had a laser cutter.....

This is a very dumb question but how do you cut foam from plans? Do you trace them on the foam and then cut it? or do you cut it with the plans on the foam? i have tried both neither work well for me. Wish I had a laser cutter.....

-joker

You glue the plans onto card stock, cut those out, then trace those onto the foam. Oh, and you use new blades and sharpen or replace frequently. It is difficult to keep that blade perpendicular during cutting.

One technique to maintain a straight line is to "drag" the knife. Hold it about 45deg to the foam, and relatively loose in your hand with index finger right on top, then just pull it down the straight edge with minimal pressure using index fingertip, only trying to get a partial cut (basically cutting through the outer "skin"). Once you get the hang of it, the knife will self align vertical to the cut. Then without moving the straight edge, make another cut with more down pressure and do this til it is through. Usually takes three strokes for me on FFF or MPF.